import 'package:flutter/material.dart';
class ReadPage extends StatefulWidget{
  @override
  State<StatefulWidget> createState() => new _ReadPageState();
}
class _ReadPageState extends State<ReadPage> {
  @override
  Widget build(BuildContext context) {
    return new MaterialApp(
      home: new Scaffold(
          appBar: new AppBar(
            // 后面的省略
            // ......
          )
      ),
    );
  }
}